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91 lines
2.7 KiB
91 lines
2.7 KiB
3 years ago
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _helperPluginUtils = require("@babel/helper-plugin-utils");
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var _helperRemapAsyncToGenerator = require("@babel/helper-remap-async-to-generator");
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var _pluginSyntaxAsyncGenerators = require("@babel/plugin-syntax-async-generators");
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var _core = require("@babel/core");
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var _forAwait = require("./for-await");
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var _helperEnvironmentVisitor = require("@babel/helper-environment-visitor");
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var _default = (0, _helperPluginUtils.declare)(api => {
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api.assertVersion(7);
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const yieldStarVisitor = _core.traverse.visitors.merge([{
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ArrowFunctionExpression(path) {
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path.skip();
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},
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YieldExpression({
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node
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}, state) {
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if (!node.delegate) return;
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const asyncIter = _core.types.callExpression(state.addHelper("asyncIterator"), [node.argument]);
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node.argument = _core.types.callExpression(state.addHelper("asyncGeneratorDelegate"), [asyncIter, state.addHelper("awaitAsyncGenerator")]);
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}
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}, _helperEnvironmentVisitor.default]);
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const forAwaitVisitor = _core.traverse.visitors.merge([{
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ArrowFunctionExpression(path) {
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path.skip();
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},
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ForOfStatement(path, {
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file
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}) {
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const {
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node
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} = path;
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if (!node.await) return;
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const build = (0, _forAwait.default)(path, {
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getAsyncIterator: file.addHelper("asyncIterator")
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});
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const {
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declar,
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loop
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} = build;
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const block = loop.body;
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path.ensureBlock();
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if (declar) {
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block.body.push(declar);
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if (path.node.body.body.length) {
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block.body.push(_core.types.blockStatement(path.node.body.body));
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}
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} else {
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block.body.push(...path.node.body.body);
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}
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_core.types.inherits(loop, node);
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_core.types.inherits(loop.body, node.body);
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const p = build.replaceParent ? path.parentPath : path;
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p.replaceWithMultiple(build.node);
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p.scope.parent.crawl();
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}
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}, _helperEnvironmentVisitor.default]);
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const visitor = {
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Function(path, state) {
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if (!path.node.async) return;
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path.traverse(forAwaitVisitor, state);
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if (!path.node.generator) return;
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path.traverse(yieldStarVisitor, state);
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(0, _helperRemapAsyncToGenerator.default)(path, {
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wrapAsync: state.addHelper("wrapAsyncGenerator"),
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wrapAwait: state.addHelper("awaitAsyncGenerator")
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});
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}
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};
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return {
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name: "proposal-async-generator-functions",
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inherits: _pluginSyntaxAsyncGenerators.default,
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visitor: {
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Program(path, state) {
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path.traverse(visitor, state);
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}
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}
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};
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});
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exports.default = _default;
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//# sourceMappingURL=index.js.map
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